Accelerated catalyst reactivation control strategy for gasoline vehicle emissions system in conjunction with N2 selective catalyst to minimize NOX remake
AssigneeFord Global Technologies, LLC
InventorsJason Wu, Eva Thanasiu, Giovanni Cavataio, Carolyn Parks Hubbard, Andrew Gregory Getsoian, Yisun Cheng, Natalie Roxas, Michael James Uhrich
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Abstract
A catalytic converter system having oxygen storage materials is disclosed and methods for determining whether to reactivate oxygen storage materials and monitoring failure events of the oxygen storage materials are also disclosed.
Claims9
A catalytic converter system comprising a first three-way catalyst and a second three-way catalyst downstream the first three-way catalyst, wherein each three-way catalyst comprises a substrate layer, an oxygen storage capacity (OSC) layer disposed on the substrate layer, and a rhodium layer disposed on the OSC layer, wherein the OSC layer of the second three-way catalyst comprises a platinum-palladium/ceria-zirconia layer, wherein the ratio of platinum to palladium is between 0.33 and 1.
A catalytic converter system comprising a first three-way catalyst and a second three-way catalyst downstream the first three-way catalyst, wherein each three-way catalyst comprises a substrate layer, an oxygen storage capacity (OSC) layer disposed on the substrate layer, and a rhodium layer disposed on the OSC layer, wherein the OSC layer of the second three-way catalyst comprises a platinum-palladium/ceria-zirconia layer, and wherein the first three-way catalyst comprises an upstream zone comprising palladium/ceria-zirconia and a downstream zone comprising platinum-palladium/ceria-zirconia.
Dependencies are inferred from the claim text.